Yes, there are employment opportunities in China for black and brown people. My own school currently employs several off-white teachers. Other schools are different. There is racism in China, just as there is racism in every other country. I believe a School which refuses employment to non-whites, is racist, but it is their prerogative. They operate as they see fit. Children in my school are taught to hate Japanese, yet our Japanese teachers fit in very nicely. If it is in the interests of a school to hire, or not hire, non-white teachers, they will go the way that is best for the school. Like it or lump it!